Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

Reply
 
LinkBack Thread Tools Display Modes
Old 07-28-2019, 12:35 PM   #1
Registered User
 
Join Date: Oct 2015
Location: Quebec Canada
Posts: 20
Battery not charging

I just bought a new battery. After two weeks it was dead. I re-charged it and it lasted two days. Am I right to assume my alternator needs to be replaced

1stSP is offline   Reply With Quote
Old 07-28-2019, 03:05 PM   #2
1997, PCA Riverside
 
rexcramer's Avatar
 
Join Date: Aug 2015
Location: Upland, CA
Posts: 1,097
Garage
With the engine running, put a multi-meter on the battery and check the reading. Should be upwards of 14 volts, if it is charging. Or take the car to AutoZone, etc. and they can tell you if it's charging. It may just need a new voltage regulator. OEM alternators are pricey. This is a DIY project with the right tools and patience. Pulling the alternator is a bit finicky. Good luck.
rexcramer is offline   Reply With Quote
Old 07-28-2019, 09:46 PM   #3
Multi-Boxer Driver
 
Deserion's Avatar
 
Join Date: Nov 2010
Location: Orange Park, FL
Posts: 1,243
Garage
Also thinking it's likely the voltage regulator. Replaced mine last fall and it cured the low alternator output.
__________________
-Chris
2004 Porsche Boxster 2.7
1991 Porsche 911 C2 Targa 3.6
2017 Subaru Outback 3.6R
Deserion is offline   Reply With Quote
Old 07-28-2019, 11:37 PM   #4
Registered User
 
Join Date: Feb 2017
Location: CO
Posts: 944
Most likely the voltage regulator, but you need to pull the alt either way. You can then have it bench tested. As mentioned, check your alt output. You could just have a bad battery as well, it happens. Pulling the alt isn’t the most fun job... it can be a real PITA in fact... plenty of info out there on how to do it.
Geof3 is offline   Reply With Quote
Old 08-23-2019, 05:05 AM   #5
Registered User
 
Join Date: Oct 2015
Location: Quebec Canada
Posts: 20
I tested it with a OBD ll scanner and it read 'Low Voltage'
1stSP is offline   Reply With Quote
Old 08-24-2019, 07:24 PM   #6
Registered User
 
Join Date: Sep 2008
Location: Florida
Posts: 2,088
1. Since you just replaced your battery, make sure connections are tight. Wiggle both cables to be sure.

2. If you don't have a meter or understand charging system, go to the Auto store of your choice and ask them to test your charging system (best) or battery.

The diagnostics aren't hard or expensive and is easy to isolate issue in most cases.

dghii is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 05:01 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page